Means for pouring glass directly from melting-furnaces.



IPATENTED JULY 30, 1907 P. T. SIE VBRT. MEANS FOR POURING GLASS DIRECTLYFROM MELTING PURN AGES.

APPLICATION FILED MAR. 1 1906.

4 SHEETS-SHEET 1.

//V l/f/l 70/11 I ms Arrows/Em.

W/TA/SSES PATENTED JULY 30, 1907.

P. T. SIBVBRT. MEANS FOR POURING GLASS DIRECTLY FROM MELTING FURNACES.

APPLICATION FILED MAR. 1, 1906.

4 SHEETS-SHEET 2.

PATENTBD JULY 30,

P. T. SIBVBRTK MEANS FOR POURING GLASS DIRECTLY PROM MELTING FURNACES.

APPLICATION FILED MAR .1,1\906.

4 SHEETS-$HEET 3.

- No. 861,401. PATEN'l-ED JULY 30, 1907.

P. T. SIEVERT.

MEANS FOR. POURING GLASS DIRECTLY FROM MELTING FURNACES.

APPLIGATION FILED MAR. 1, 1906.

' 4 SHEETS-SHEET WWW/56355 m/vE/v TOR mass of glass. Moreover,

like, suffers from the defect from the furnace to the quired and,moreover, of loss which is by no UNITED STATES.

PAllL THEODOR SIEVERT, OF DRESDEN, GERMANY.

' Specification of Letters Patent. Application filed March 1, 1906.Serial No- 303,640.

Patented July 30, 1907.

To all whom it may concern.-

Be it known that I, PAUL Tnnonon Smvnnr, manufacturer, a subject of theKing of Saxony,.residing in Dresden, in the Kingdom of Saxony, GermanEmpire, Winckelmannstr. -l, have invented certain new. and usefulImprovements in Means for PouringGlass Directlyfrom Melting-Furnaces, ofwhich the following is a specification.

It is well known that the method of ladliug the glass out of themelting-furnace by means of a ladle, or the that in consequence of theladle being dipped into the glass the latter becomes bubbly, i. s.air-bubbles are introduced into the it is always a somewhat dilfitotransport the filled ladle place where the glass is rethere is always acertain amount means insignificant due to the which, of necessity, mustremain proposals have previously cult and lengthy matter remnantoi theglass in'the ladle. Consequently,

been made to draw off the glass directly from the furorder to be able tomust he made a very considerable size.

, her from the out-side air by means of mace and to let it flow into themold, in order to entirely avoid the necessity of manipulating theladle. The invention has been to attain this by addingto'the'melting-inrnace a fire-chamber into which the mold isconveyed,.in orderto be filled. The glass then rims directly from thefurnace-bath into the mold and, after the latter has been filled, it isremoved from the firechsmber. This latter process is-.however subject tocertain drawbacks, for instance the fire-chamber, in

accommodate-molds for manufacturing somewhat large objects, ,such asplate-glass, Moreover the iron molds, particularly when they are filledonly gradually, are heated to an extremely high temperature in thefire-chamber which may cause the glass'to adhere to the walls of themolds. Again, each time the fire-chamber is opened, a great deal of heatis lost and the holding and transporting of the. heated molds isdifiicult and dangerous, For these reasons, the attempt to let the glassflow directly from the furnacebath into the mold has been abandoned, butthe attempt has been made to arrange a store-ladle or glasspot, or thelike, into which the glass flows from the furnace and out of which itcan then be poured into the mold. Such ladlcs have been hithertoarranged by building them into the lower wall or bottom of thefirechamber, in such a way that they close the firechamtheir surface andcan be conveyed, after having been filled, to the place where pouring isto take place. This arrangement involves the great disadvantage that thewalls of the ladle are not in all parts uniformly heated, so that thelayer of glass at the bottom of the ladle remains colder rmdily resultsin the glassbeing defective and streaky. Or, instead of thisarrangement, the ladle, capable of swinging about a fixed axis, wasarranged in the firechamber under the outlet opening or the overflow ofthe melting-bath, so that the ladle was emptied by tilting it upon itsaxle. In this case again, however,

' the mold had each time to be inserted in the fire-chamber, a thingwhich, as explained above, is disadvantageous in many respects. Also itis very diflicult to permanently keep the mechanism for tilting theladle in working order, as said mechanism is continually exposed to thehigh temperature of the lire-chamher. Now according to the pouring-ladleis erected upon a section or portionsoli the wall of the closedfire-chamber, said section being removed from the wall when it isdesired to run the glass The ladle is so mounted that it is sides, andespecially at its bottom, by the furnace gases. By this arrangement,apart from a number of obvious advantages, first and foremost theadvantage is attained that the requisite transporting means, instead ofengaging with the ladle itseli,

out of the ladle. played upon on all present invention, the.

can engage with the exterior of the wall of the lire: Y

chamber where the temperature is by no means too high. Consequently, itis possible to employ perfect transporting means which work reliably, bythe aid ofv which the ladle can be conveniently, safely, and, what is ofthe greatest importance, out of the fire-chamber to the molds and backagain. By this arrangement the temperature of the glass in the ladle iskept in all itsparts continually absolutely uniform. I

The arrangement can be especially simply carried out if the ladle,together with the portion of the wall on which it rests, is removeddownwards from the lire chamber, 2'. c. if it is lowered and tilted forthe purpose of being discharged. With this object in view, it is onlynecessary to place the portion of the wall to be lowered upon a carrierto which the requisite movements for lowering and tilting it can begiven.

An arrangement of this kind is represented in the accompanying drawing.

In -this drawing, an arrangement is selected in which a inciting-furnaceis provided with a circular or semicircular cxtension forming alire-chamber. This fireclialnbcr is provided with a fairly large numberof the new devices. The new devices could, however, of course be alsoarranged separately in connection with a melting-furnace.

In said drawing:Figure l is a part sectional of a melting-furnace withan and with the new devices. tratcd differently in each case, ondilierent horizontal planes,

plan arc shaped fire-chamber Said devices are illusthe section beingtaken the section of one de- -vice being on one plane and of the otherdevices on other planes. Fig. 2 is a part sectional elevation quickly,brought I through the furnace and fire-chamben The ladle for is avertical part sectional elevation and corresponds toFig. 2, theglass-ladle,.' however, being in the position which it occupies whilebeing discharged or emp-' tied during the pouring operation. Fig. 4,finally, is, in its right half, a vertical section through thefirechamber of the furnace and througha ladle in its nor. mal positionof rest, and in its left half a front elevation, the ladle being in itslowered position before being tilted. I

A glass melting-furnace 1, of known construction, is provided with anextension forming a fire-chamber; This is closed by means of a wall 3formed of fire-bricks, ovthe like, but is connected with the innerportion of the furnace and with the ,fire space, so that it is kept atthe melting temperature of'the glass.

In the fire-chamber 2, a suitable number of pets 4 are mounted, eachbeing'on a movable plate 5, which plate, in the normal position of restof the pot (Fig. 2

forms a portion of the wall which closes the fire-chamber. Between theplate 5 and the pot, refractory supports 6 are placed, in order toenable the furnace gases to play upon the pot even underneath it Themelting-bath l of the furnace is closed from the extension'2 by means ofa table 7 which may be suitably heated by means of a gas c hannel 8.Channels or grooves 9 formed in said table conduct the liquid glass in athin sheet into the various pots 4. The

glass passes into the back compartment of the pots,

which compartment, in order to keep back impurities and bubbles floatingon the surface of the glass, is

separated in a well-known manner by means of across-,

" piece 10 from the-front compartment from which the glass is poured, insuch a manner that the front com partment' is connected with the backcompartment only through a connecting channel 11 at he bottom of' thepot. 1 I

The removal of the pets from the lire-chamber-for the purpose of pouringis effected by transporting' means which engage from without the movableportion 5 of the wall upon which the pot rests. In the particular.arrangement shown, the portion 5 of the .wall is removed downwards andthe emptying of the.

glass is effected by subsequently tilting the pot forwards, whichenablesthe glass to flow along the spout 12 of the pot and into the mold45 (Fig. 2) or on to the rolling-table 46 (Fig. 3).. I The portion 5 ofthe wall is connected by means of .the hinges 13, 13 with the carrier 14which in the em bodiment represented is fork-shaped in plan (see themiddle pot, Fig. 1). The carrier 14 is mounted upon a toothed pillar or.rack 16 which is displaceable ina vertical pit. 15, and said pillar canbe raised and lowered by means of the toothed wheel gear,. 17, 18, 19,120, 21, 22 from the hand wheel 23. The weight of the pillar 16 of thecarrier 14 and of the. portion 5 of the wall, aswell as that of the pot,is'counterbalanced by a counterweight 24. This engages with the chain 26provided with the small counterpoise 25. Said chain passes over achain-wheel 27 on the shaft 18. The counterweight 24 runs in the pit 28.

In the normal position of'rest represented in Fig. l

Consequently, 5 of the wall and -the pot ,4 first of all retain theirhorican pass by.

the under side of the portion 5 of the wall, at the front end of whichthe hinges 13, 13 are provided, rest upon the support 0 block 29 formingpart of thecarrier 14. during the lowering operation, the piece zontalposition. However, as soon as they are at the height at which the glassis to be poured out, a stop 30 arranged at the back end .of the portion5, which stop in the embodiment represented is in .-the form of aroller, comes against a pillar or abutment 31 and when the carrierislowered still more, the portion 5 oithewall, together with the pot 4resting thereon, is tilted forwards, so that the glass runs out ofthespout 12 (Fig. 3). The downward movement of the pillar 16 with thecarrier 14 is limited by means of anose 32 on the abutment '31. uponwhich the undet end of the. block 29 on-the carrier 14 rests, when thepot is sufficiently tilted. I

' If, as is the case with the embodiment represented, the spout 12 ofthe pot projects over the edge of the portion 5 of the wall, roommust-be provided for the spout, in order to permit the pot to belowered. This is effected in the present instance by providing in thelower wall of the fire-chamber 2, apart from the section 5, a secondremovable portion 33, one for each pot.

'lhese' portibns 33 can be drawn back on suitable guides 35 by means ofhandles 34, so that the spout In the portions 33 of the wall, reservoirs36 are provvided. v In these reservoirs, the glass which may possiblyflow over, collects before the emptying of the pots.

Thiscollection of glass resulting from the overflowing of the pot can bereplacedin the tank from time to time.

In the channels 9 which lead over the table 7 from the melting-bath oithe glass-furnace to the pets 4,

grooves 37 are provided, into which firebricks 38 which act as slides orgates carrbc inserted, in order to close or block the channels fr timeto time, or to reduce the velocity with which til The bricks 38 areusually kept in the openings 39 in thearc-shaped wall 3 for the purposeof being preliminarily warmed, in order to avoid the danger of cracking.They can, however, be moved by means of the rods 40 intp their positionin the grooves 37 in the channels 9, said rods 40 being introducedthrough openings 4']. (Fig. 1). The openings 41 are, of course, usuallyclosed by means of covers 42 provided with handles 43. They arepreferably arranged in the wall 3, one between each pair of pots, inorder that the rods 40, when the bricks 38 are being inserted orremoved, may not require to be pushed exactly over the pots containingthe molten glass where the temperature is 'very high, but so that theycan be moved obliquely past the pots(see the left of Fig. 1).

In the drawings, two different kinds of molds are representedinto whichthe glass is poured. In Fig. 2 a flat mold mounted upon a carriage 44 isshown,, said mold being adapted for the formation of glass layers whichare then gripped by a carrying frame and blown to form a hollow article.7 In Fig. 3, a rolling table 46 is represented upon which theglass-flows directly from the pot v4. It is obvious that these molds aremerely given by way of example.

1 It may further be mentionedthat the described ar-- 6 glass flows alongsaid channels. j

'rangement for raising and lowering the carrier M is likewise givenmerelyby way of example. Instead of the hand wheel 33, a motor could beused which could drive the toothed pillar by means of an y suitablegear. Instead oiesuch an arrangement, the raising and lowering of thecarrier might be effected by means of hydraulic or pneumatic power.

What; I claim is:

1. The comblnation of a glass-melting furnace provided" with a closedfire-chamber having walls. with a removable portion, a pot mounted onsaid removable portion in such a -position that in its normal positionof rest. it is played up beneath and on all sides by the furnace gasesand receives the glass flowing from the furnace, a vertically displace--able carrier pivotally supporting said removable portion of thetire-ch11 nher walls, a means for lowering said carrier with saidremovable portion and the pot mounted thereon for the purpose ofenabling the glass to be poured from said pot, and an abutment arrangedunder the removable portion and adapted to limit the downward motion ofthe --part of the latter engaging said abutment wl en the carrier is.sufficiently lowered, whereby on the carrier cont tilingto descend theremovable portion of the 'fire-ehambe walls with,i.he pot' mountedthereon is tilted and the glass poured out.

L. The combination of a glass-melting t'nrnat-e pl'ovitloti ovlth arloscd lirechamber havin; walls with two remorable portions, a pot.mounted on one of said removable por tions in such a position that inits normalposition of rest: it is played upon l' neath and on all sidesby the furnace gases and receives the glass flowing t'rom the furnace,nit-ans for removing said removable portion and the pot, mounted thereonfrom the iire-elmmlmr tor the: purpose of enabling the glass to bepoured from said pot. and for snhseqnently returning said removableportion and empty .pot to their normal position of rest, and moans forremoving the other removable portion when the lirst removable portion isremoved for the purpose of enabling the pot to pass nnimpededly out ofthe tire-chamberand back into the same.

In witness \\lltl't't)i l have hereunto ietl my namithis lllth day of lehrnary 1906, in the prest. ire of two subscribing witnesses.

Witnesses Paul. Ii, Scnimaso. lAuI, AllllAS.

